Sharp LC-26GA4D Service Manual page 41

TROUBLE SHOOTING TABLE
DVI Input (Digital PC mode)
Are there Rx0, 1, 2 and C signal
inputs to IC1900?
YES
Are there Hsync, Vsync and RGB
DAC signal outputs from IC1900?
YES
Are there RGB, Hsync and Vsync
signal outputs from MD connector?
YES
Are there RGB, Hsync and Vsync
signal inputs to the main PWB
IC3700 and IC3701?
YES
Check IC3700, IC3701 and their
peripheral circuits.
NO
Are IC1915 data accessed by I
when connected to PC?
NO
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
NO
Do pins (12) and (14) become (L, L)
when analog AV mode is entered?
NO
Check ME connector I
NO
Check IC1900 and its
peripheral circuits.
NO
Check IC1901, IC1903 and
their peripheral circuits.
NO
Check MD harness for
disconnection.
41
(Continued)
2
YES
C
Check PC settings.
YES
Check IC1915 and its
peripheral circuits.
YES
Check IC1917 and its
peripheral circuits.
2
C signal line.
LC-26GA4D
LC-26GA4U